Surface Area of Cuboids - Problem Solving

A problem solving task that gives students lots of practice finding the surface area of cuboids. Students are told what the surface area of each cuboid is, but are only given 2 of the 3 lengths needed to calculate the surface area - they must determine what the missing length is. All possible answers are given at the bottom of the page for students to cross off as they go.

I designed this for a Year 7 mid-ability group who solved it through trial and error, however it could also be solved algebraically (using linear equations).

Solutions are provided.